The DEA Just Approved a Way to Smoke Marijuana Legally for the First Time

The unofficial pot-smoking holiday of April 20 may be over, but marijuana advocates got another reason to celebrate on Thursday. The U.S. Drug Enforcement Administration for the first time approved smoking marijuana as legitimate medical research.

The DEA green-lit a clinical trial of smoked marijuana for the treatment of post-traumatic stress disorder (PTSD) in American military veterans, a spokesperson for the government agency confirmed to Fortune. While other trials have studied the medical benefits of marijuana and cannabis extracts like cannabidiol, this is the first time regulators have allowed testing of the marijuana plant itself for the purpose of developing it into a legal medical drug.